Island



(No Model.) 2 'Sheets-Sheet 1. J. C. TAPT.

ROTARY SWAGING MACHINE. No. 515,376. l Patented Peb. 27, 1894.

m! "Immun uhmurmne cmauuv wAsmNAYoN. n. n,

2 Sheets-Sheet* 2.

(No Model.)

J. C. TAFT. ROTARY SWAGING MACHINE. No. 515,376. Patented Feb. 27, 1894.

mug/fm w1. f5 a G .re 1

RX E

UNITED STATES PATENT innen JEROME C. TAFT, OF PROVIDENCE, RHODE ISLAND.

ROTARY SWAGING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 515,376, dated February 27, 1894.

Application filed March 24, 1892. Serial No. 426.302. (No model.)

To a/ZZ whom t may concern:

Be it known that LJEROME C. TAFT, a citizen of the United States, residing at Providence, in the State of Rhode Island, have in vented a new and useful Improvement in Rotary Swaging-Machines, of which the following is a specication.

My invention consists in an axial guide, adapted to rotate with the die-holding head, and cause the wire or bar which is held in the blank-holder, to rotate with the dies, the said guide and holder being adapted for use in the manufacture of either straight or spirally grooved drills, and for other purposes.

Figure l, represents a front elevation of a rotary swaging machine to which my improvement is applied. Fig. 2, represents a vertical section of the same. Fig. 3, represents a rotary swaging-machine with the coverin g plates removed to show the beaters and the dies. Fig. 4, represents a straight-grooved drill as formed by the action of the swagin g dies of the revolving head, shown in Fig. 3. Fig. 5, represents a side view of the blankholder provided with a spiral-guiding-groove. Fig. 6, represents a vertical section of a swaging-machine provided with a hand operated screw, for operatingthe spirally grooved blank-holder. Fig. '7, represents the face view of a die adapted to form a spiral groove in the blank. o

In the accompanying drawings, A represents the frame of the machine, which is provided with the opposite beaters a a, made adjustable by means of the screws b, as shown in Fig. 3.

The rotary die-holding head B, is provided with the radial grooves c, c, crossing each other at right angles, and in the said grooves are placed the sliding dies d el, d d', which are held in position by means of the covering plate e, fastened to the head B by means of the screws f f. To the rotary head B, is secured the axial-guide C by means of the screws g, g, the said guide being bored out to receive the sliding blank-holder D, which is provided with a'longitudinal guiding groove h, adapted to receive the point of the screw i, by means of which the holder will be caused movement in an axial line, within the guide.

The inner end of the blank-holder is bored out to receive a drill-blank or other bang', and may be secured tothe holder by means of a set screw 7c, while the outer end of the holder is provided with a knob or handle m,

by means of which the holder may be pushed forward, so as to subject the drill-blank to the action of the dies d d, d' d, the dies d d, being adapted to swage the longitudinal grooves n, While the dies d d, operate upon the rounded edges o, o, of the drill. The guiding groove h, is made to extend to the extreme forward end of the holder D, so that when the inserted drill-blankj has been properly swaged to form the longitudinal grooves n, the holder can be withdrawn, the grooved drill removed therefrom, and a new blank secured therein,preparatory to the re-insertion of the holder into the guide, and the continued operation of the dies. The guiding groove h may also be made in spiral form, as shown in Fig. 5, by means of which opposite spiral grooves can be swaged in the drill blankj, by the employment of dies CZ having an inclined face d2, as shown in Fig. '7, and an arrangement for operating the holder D endwise in the axial guide O, by means of a screw, is shown in Fig. 6, in which the blank-holder D, is provided with collars 7o', k', arranged at each side of the bearing-arm E, which is held loosely upon the hub m of the hand wheel F; the said bearing-arm being retained upon the holder D, between the collars 70', k', by means of the removable pin fr', which crosses the open bearing slot p. To the hub O projecting from the plate G, is fastened the stationary screw H, which is adapted to fit the screw thread in the cavity of the hub m of the hand-Wheel, so that when the hand-wheel is being turned, a powerful forward or backward movement will be imparted to the blank-holder D, in

IOO

insertion of another blank in the holder, and

the reinsertion of the holder into the guide.

I have represented my invention as applied to a swaging machine in which two opposite sets of dies are employed ai: right angles to each other, but my invention is applicable t0 machines in which a single set of oppositely acting dies is employed.

I claim as my invention- 1. The combination with a rotary head carrying opposite sWaging-dies, of the axialguide adapted to revolve with thehead and the blank-holder adapted to revolve with the guide and have an axial movement, substantially as described.

v 2. Thev combination vWith the rotary-head carrying opposite. swaging-diesfof,` the `axialguidel-adapted 1o revolve with thevhead, and the blank-.holder adapted to revolve With the guide and have a spiralaXial-.n1ovement, substantially asdescribcd.

3. The combination with the rotary-head carrying opposite sWaging-dies, the axialguide adapted to revolve with the head, and the blank holder, of the operating screw ladapted to impart an axial movement to the Vitnesses:

S. SoHoLFIELD,- JOHN S. LYNCH. 

